diff --git a/src/custompios b/src/custompios
index 936c9cfd..7e732b90 100755
--- a/src/custompios
+++ b/src/custompios
@@ -91,7 +91,14 @@ pushd $BASE_WORKSPACE
     echo "Error: could not find image: $BASE_ZIP_IMG"
     exit 1
   fi
-  7za x -aoa "$BASE_ZIP_IMG"
+  
+  if [[ $BASE_ZIP_IMG =~ \.img$ ]]; then
+    # if the image is already extracted copy over
+    cp "$BASE_ZIP_IMG" .
+  else
+    7za x -aoa "$BASE_ZIP_IMG"
+  fi
+  
   BASE_IMG_PATH=`ls | grep '.img$\|.raw$' | head -n 1`
   if [ ! -f "$BASE_IMG_PATH" ]; then
     echo "Error, can't find image path, did you place an image in the image folder?"